Lighting device for sewing machines



April 27, 1-954 w. J. PEETS ETAL 2,677,042

LIGHTING DEVICE FOR SEWING MACHINES Filed April 28, 1951 2 Sheqts-Sheet l i Q l a N! g 5 i F; $3,, Y

4: 1: w w "H L v J i i i g II I I I a ti Q INVENTORS Wilbur J Peets and, --By cflnthon y JJWazuzas WITNESS= I W @W- a W um ATTORNEY April 27, 954 w. J. PEETS ETAL 2,677,042

v LIGHTING DEVICE FOR SEWING MACHINES I Filed April 28, I951 2 Sheets-Sheet 2 INVENTORS Wilbur J Peets and ATTORNEY y cflntkon y Jdlfdtuzas Patented Apr. 27, 1954 UNITED i STATES PATENT OFFICE LIGHTING DEVICE FOR'SEWING'MACHINES Wilbur J. Peets Watchung, and. Anthony J..

Matuzas,-:Union,,N. J., assignors to The Singer Manufacturing Company,,Elizaheth, N.. J., a corporation of.-New Jersey Application April 28, 1951; Serial No. 223,488

3% Claims. (01. .240. -2.14)

This invention relates: to asewing machine and more particularly to aelighting device fora sewing machine.

An object of the-invention is to provide a light for a sewing machine which will adequatelylight.

the stitchingarea of the sewing machine;

Another object of theinvention isto provide a sewing. machine light which will concentrate beams of light at thestitchin'giarea of the'sewing machine.

A furth'er objectzoftheinvention is to provide a sewing machine=light with a reflector and lens which are readily removable for bulb replacement and servicing.

With the above-and other objects in view, as

will hereinaiterzappear; the invention comprises the devices, combinations and arrangements of parts hereinafter set :forth and illustrated in the accompanying drawings of-a preferredembodiment of the invention, from: which the several.

bracket-arm and lighting device taken on line 3-3 of Fig. 1.

Fig. 4 is a partial sectional view of the sewing machine bracket-arm and lighting device taken on line t4 of Fig. 1.

Fig. 5 is a partial sectional view of the sewing :1.

machine bracket-arm and lighting device taken on line 5-5 of Fig. 1.

Fig. 6 is a rear perspective view of the lighting device reflector and lens.

Referring more specifically to the drawings, the invention is disclosed as being embodied. in a sewing machine having a bed 10. A bracketarm 1 I having a standard mounted on and rising from the bed I3, is provided with a hollow horizontal portion which terminates at its free end in a head l2. A needle I3 is carried by a needle-bar 14 mounted in the head l2. The needle I3 passes through a hole in the usual throat-plate 15 mounted on a cloth-plate I6. A balance-wheel H is attached to one end of a rotary actuating shaft 18 journaled in and extending longitudinally of the bracket-arm. A bobbin-winder support arm [9 is pivotally connected to the bracket-arm II by a pivot stud 20. The support arm l9 carries a bobbin spindle 2| which is driven 2-. by a-friction .wheelzllfastened to one-end of the spindle .21. The friction 'wheel 22 may-bermanually pressed against :a hub portion .23 of the balance-wheelhymeansaof a handle 2Q integral with and. forming; an extension of. the support arm 19.

The bracket-arm I I is .formed in the .front wall thereof with a recess =25; to receive a-lighting unit 2'! which.comprises'arlamp-socket and switch 28 and an'el'ectric-lightbulb 29. Thelighting unit 2? is attached to thezbracket-arm by means of a clamp 30 which encircles the'lamp, socket and is fastenedtothe bracket-arm by ascrew 3|. A switch operating.knobi32'is'positioned to be readily accessible at the :under sideof the lampand an electrical conductor 33 is-attachedto the socket 28 andto a suitable electric power source (not shown). A light-reflector '34 is fastened to the front-wall of ,the1bracket-arm H by screws 35 and .36. The inner'orreflecting surface of the reflector is. formed-with .a support groove 31 extending alongzonezendiand approximately onehalf the length ofithecrefl'ecton A'similar and horizontally" opposed support groove 38 is formed in thebracket-.armiaround-oneend of the recess25;

A lens-39 is-iormed with alight focusing portion Ml'iand asupport lip or flange 4|. One portion of. the :lip' 4| ispositioned' in the support groove 31 in the reflector 34. The lens is fas tened to the reflector by a clamp 42 which is positioned over the inner edge of the lens lip por-- tion and fastened to the reflector by a screw 43. The reflector and lens assembly is positioned against the bracket-arm with the bracket-arm support groove 38 receiving the remaining portion of the lip M. The screws 35 and 36 are inserted through suitable holes 44 and 45, respectively, in the reflector and are threaded into holes 46 and 41, respectively, in the bracket-arm to hold the reflector and lens in place. It should be noted that the lens 39 extends beneath the bulb 29 and a small portion of the socket 28 but does not interfere with the switch operating knob 32.

From the foregoing description, the advantages of my invention will be readily apparent. In assembling the lighting device, the lighting unit Zl comprising the socket 28 and bulb 29 is attached to the bracket-arm by means of the clamp 30 and the screw 31. The lens 39 is positioned on the reflector 34 with the groove 31 receiving a portion of the lens lip 4|. The lens clamp 42 is fastened to the reflector by the screw 43 to hold the lens in place on the reflector. The

lens and reflector assembly is easily positioned on the bracket-arm with the remaining portion of the lens lip 41 positioned in the bracket-arm groove 38 and the fastening screws 35 and 36 are then threaded into place. Thus, in assembling the device the complete lens and reflector assembly is easily attached to the bracket-arm. There is no lens to be handled individually with the resulting high percentage of breakage. Similarly, when it is necessary to replace a broken or burned out bulb or service the socket 28, it is only necessary to remove the two attaching screws 35 and 36 and remove the reflector and lens assembly as a unit. The bulb and socket are then readily accessible and the bulb may be easily replaced or the socket may be serviced. After the necessary servicing has been done, the lens and reflector assembly is again positioned on the bracket-arm with a portion of the lens lip 4| in the bracket-arm groove 38 and the reflector attaching screws 35 and 36 are threaded into place. Throughout the servicing operations, the lens and reflector are handled as an assembly which, when removed, completely exposes the light bulb 29 and the socket 2B. When the lighting device is completely assembled, as shown in Fig. 1, the lens 39 permits light from the bulb 29 to be evenly distributed over the cloth-plate it except for the area of the throat-plate it. The focusing portion 48 of the lens concentrates beams of light at the stitching area to brightly illuminate that area. Thus the entire area of the cloth-plate is evenly and adequately lighted while the stitching area is brilliantly lighted by the concentrated beam of light. Thus I have provided a lighting device which provides adequate lighting over the entire cloth plate; provides brilliant illumination at the throatmlate; is easily assembled; and the reflector and lens of which can be removed as an assembled unit for easy access to the light bulb and its socket.

Having thus set forth the nature of our invention, what we claim herein is:

1. In a sewing machine having a frame including a bracket-arm provided in its front wall with a clearance recess and With a groove, both extending lengthwise of said bracket-arm, a light unit having a portion thereof disposed in said recess and secured to said bracket-arm, a reflector-unit comprising a segmental reflectorelenient internally provided with a groove extending lengthwise of said reflector-element, a lens having oppositely directed side flanges, and means for securing said lens to said reflectorelement with one of the side flanges of said lens seated in the refiector-element groove, and means for securing said reflector-element to said bracket-arm with the other side flange of said lens seated in the groove of said bracket-arm.

2. A sewing machine having a bed, a bracketarrn carried by said bed and terminating in a head, said bracket-arm having a recess and a lens supporting groove formed in its front wall, a lighting unit carried by said bracket-arm in said recess, said lighting unit having a switch control and a light source, a light reflector positioned over said lighting unit and having a support groove formed in its reflecting surface, a lens positioned in said grooves and removably fastened to said reflector, said lens extending under said light source only, and removable fastening means securing said reflector to said bracketarm and accessible when said lens is secured to said reflector.

3. A sewing machine having a bed, a bracketarm carried by said bed and terminating in a head, said bracket-arm having a recess and a lens-supporting groove formed in'the bracketarm, a lighting unit comprising a light source and a light switch carried by said frame in said recess, a light reflector positioned over said lighting unit and provided with a lens-supporting groove in its reflecting surface, a lens positioned in said grooves, a single clamp and clamp-screw securing said lens to said reflector, said lens extending under said light source only, and remov able fastening means securing said reflector to said bracket-arm and accessible when said lens is secured to said reflector.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,726,907 Lewensohn Sept. 3, 1929 2,031,562 Goosman Feb. 18, 1936 2,208,522 Cullman July 16, 1940 2,286,492 Langille -1 June 16, 1942 

